Method for determining reference signal, network device, ue, and computer storage

ABSTRACT

The present disclosure discloses a method for determining a reference signal (RS), a network device, a user equipment (UE), and a computer storage medium, where the method includes: configuring N control resource sets for a UE, where K pieces of transmission configuration indication (TC) information is configured in each of at least part of control resource sets in the N control resource sets, and a quantity of the TCI information K configured in different control resource sets in the at least part of control resource sets is the same or different; where N and K are integers greater than or equal to 1, and at least one RS is indicated in each piece of TCI information; and indicating to the UE the at least one RS in the K pieces of TCI information.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional application of U.S. patent applicationSer. No. 16/696,867, filed on Nov. 26, 2019, which is a continuationapplication of the International application PCT/CN201/081643, filed onApr. 2, 2018, entitled “METHOD FOR DETERMINING REFERENCE SIGNAL, NETWORKDEVICE, UE, AND COMPUTER STORAGE MEDIUM”. The contents of theseapplications are hereby incorporated by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the field of information processingtechnologies, and in particular, to a method for determining a referencesignal (RS), a network device, a user equipment (UE), and a computerstorage medium.

BACKGROUND

Currently, in order to perform beam failure detection, a UE needs tomeasure a reference signal (for example, a CSI-RS, an SS/PBCH block andetc.) corresponding to a physical downlink control channel (PDCCH).Currently, there are two kinds of methods: Method 1: a networkconfigures a group of RSs for a UE as a measurement signal for the beamfailure detection; Method 2: if the network does not configure anything(i.e., does not use Method 1), the UE itself determines, based on aquasi co-location (QCL), a group of RSs as the measurement signal forthe beam failure detection.

Regarding Method 2, there are some problems with the current solution. Aconfiguration for a control resource set (CORESET) may include aplurality of transmission configuration indication (TCI) states, if theUE needs to take an RS signal indicated in each of the TCI states as ameasurement RS signal for the beam failure detection, two problems mayoccur: a complexity of the UE is increased, and a beam associated withthe QCL indicated by some of the TCI states is not used for the currentPDCCH transmission. Therefore, a measurement on a reference signalcorresponding to this beam cannot truly reflect a quality of the PDCCHtransmission.

SUMMARY

To solve the above technical problem, embodiments of the presentdisclosure provides a method for determining a reference signal (RS), anetwork device, a user equipment (UE), and a computer storage medium.

An embodiment of the present disclosure provides a method fordetermining a reference signal (RS), applied to a network device andincluding:

configuring N control resource sets for a UE, where K pieces oftransmission configuration indication (TCI) information is configured ineach of at least part of control resource sets in the N control resourcesets, and a quantity of the TCI information K configured in differentcontrol resource sets in the at least part of control resource sets isthe same or different; where N and K are integers greater than or equalto 1, and at least one RS is indicated in each piece of TCI information;and

indicating to the UE the at least one RS in the K pieces of TCIinformation.

An embodiment of the present disclosure provides a method fordetermining a reference signal (RS), applied to a UE, including:

receiving N control resource sets configured by a network side for theUE, where K pieces of transmission configuration indication (TCI)information is configured in each of at least part of control resourcesets in the N control resource sets, and a quantity of the TCinformation K configured in different control resource sets in the atleast part of control resource sets is the same or different; where Nand K are integers greater than or equal to 1, and at least one RS isindicated in each piece of TCI information; and

receiving the at least one RS in the K pieces of TCI informationindicated by the network side to the UE.

An embodiment of the present disclosure provides a network device,including:

a first communicating unit, configured to configure N control resourcesets for a UE, where K pieces of transmission configuration indication(TCI) information is configured in each of at least part of controlresource sets in the N control resource sets, and a quantity of the TCIinformation K configured in different control resource sets in the atleast part of control resource sets is the same or different; where Nand K are integers greater than or equal to 1, and at least one RS isindicated in each piece of TCI information: and indicate to the UE theat least one RS in the K pieces of TCI information.

An embodiment of the present disclosure provides a UE, including:

a second communicating unit, configured to receive N control resourcesets configured by a network side for the UE, where K pieces oftransmission configuration indication (TCI) information is configured ineach of at least part of control resource sets in the N control resourcesets, and a quantity of the TCI information K configured in differentcontrol resource sets in the at least part of control resource sets isthe same or different: where N and K are integers greater than or equalto 1, and at least one RS is indicated in each piece of TCI information:and receive the at least one RS in the K pieces of TCI informationindicated by the network side to the UE.

An embodiment of the present disclosure provides a network device,including: a processor and a memory for storing a computer programcapable of running on the processor;

where the processor is configured to perform steps of the above methodwhen the computer program is run.

An embodiment of the present disclosure provides a UE, including: aprocessor and a memory for storing a computer program capable of runningon the processor:

where the processor is configured to perform steps of the above methodwhen the computer program is run.

An embodiment of the present disclosure provides a computer storagemedium storing computer executable instructions which, when beingexecuted, implement steps of the above method.

In technical solutions according to the embodiments of the presentdisclosure, when it is capable of configuring the control resource setfor the UE, only K pieces of TCI are configured in part of the controlresource sets, and at least one RS in the K pieces of TCI are indicatedto the UE, thus avoiding that the UE measures RSs corresponding to allthe TCI in all the control resource sets, thereby reducing a powerconsumption of the UE and improving an accuracy of beam detectionperformed by the UE.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic flowchart 1 of a method for determining an RSaccording to an embodiment of the present disclosure;

FIG. 2 is a schematic flowchart 2 of a method for determining an RSaccording to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a user equipment (UE)according to an embodiment of the present disclosure; and

FIG. 4 is a schematic diagram of a hardware architecture according to anembodiment of the present disclosure.

DESCRIPTION OF EMBODIMENTS

In order to understand the features and technical contents of theembodiments of the present disclosure in more detail, it should first benoted that the RS proposed in the embodiments of the present disclosuremay refer to an RS signal, or an RS resource, or an RS resource group.For example, a CSI-RS resource, an index of an SS/PBCH block, or aCSI-RS resource group identifier, and the like, are all within the scopeof the concept of the RS in the embodiments of the present disclosure,which are not exhaustively listed herein.

The implementation of the embodiments of the present disclosure isdescribed in detail below with reference to the accompanying drawings.The accompanying drawings are for illustrative purposes only and are notintended to limit the embodiments of the present disclosure.

Embodiment 1

An embodiment of the present disclosure provides a method fordetermining an RS, which is applied to a network device. As shown inFIG. 1, the method includes:

Step 101: configuring N control resource sets for a UE, where K piecesof transmission configuration indication (TCI) information is configuredin each of at least part of control resource sets in the N controlresource sets, and a quantity of the TCI information K configured indifferent control resource sets in the at least part of control resourcesets is the same or different; where N and K are integers greater thanor equal to 1, and at least one RS is indicated in the TCI information.

Step 102: indicating to the UE the at least one RS in the K pieces ofTCI information.

Here, the quantity of the TCI configured in different control resourcesets in the at least part of control resource sets is the same ordifferent, that is, K corresponding to the K pieces of TCI configured indifferent control resource sets (CORESET) in the at least part of theCORESETs can be the same or different.

In an NR system, a network can be configured with one or more CORESETs,each CORESET can contain a time-frequency resource (such as whichfrequency domain resources are occupied, how many consecutive timedomain symbols are occupied), and other configurations, such as a quasico-location (QCL) for an antenna port, the QCL is provided by ahigh-level parameter TCI the parameter is configured for a DM-RS antennaport received by a PDCCH.

In addition, the method may further include: configuring M search spacesfor the UE, and the at least part of control resource sets is associatedwith at least one search space of the M search spaces, and the searchspaces are used for the UE to detect at least one RS in the K pieces ofTCI information in a control resource set corresponding to a PDCCH.

That is, after aiming at the at least part of control resource sets(CORESET), it is necessary to indicate a search space associated withthe at least part of CORESETs to the UE, after which the UE will detectthe corresponding PDCCH.

Based on the above description, various processing scenarios areseparately performed below:

Scene 1

When one CORESET is configured with multiple TCI states, an RScorresponding to the activated TCI state is used as a measurement RS forbeam failure detection.

The network configures N CORESETs for the UE, where K TCI states areconfigured on CORESET X. The network configures M search spaces for theUE to monitor the PDCCH, where CORESET X is associated with one or moreof the search spaces.

In this scenario, when indicating the RS to be used, the followingmethod is adopted, where the indicating to the UE the at least one RS inthe K pieces of TCI information includes one of the following:

in the K pieces of TCI information, an RS indicated by TCI informationactivated through MAC CE signaling;

in the K pieces of TCI information, an RS indicated by TCI informationindicated through DCI.

Specifically, for the beam failure detection, when the UE needs todetermine a link quality of the PDCCH corresponding to CORESET X, it isrequired to determine from the K TCI states that an RS indicated in acertain TCI state is used, and the determining method has the followingoptions:

in the K TCI states, the one activated under the indication of the MACCE signaling.

in the K TCI states, the one activated under the indication of the DCI.

Scene 2

When one TCI state indicates one piece of QCL information, an RSassociated with a spatially correlated QCL is used as the measurement RSfor the beam failure detection.

The method further includes: indicating QCL information in a piece ofTCI; where the QCL information corresponds to at least two pieces of RSinformation; where RSs indicated by the at least two pieces of RSinformation are the same or different, and different RS informationcorresponds to different QCL parameter types.

That is, the network configures N CORESETs for the UE, where one TCIstate is configured on CORESET X, and the TCL state indicates one pieceof QCL information, and this QCL information corresponds to two RSs, andeach of the RSs corresponds to a different QCL parameter type. It shouldbe understood that two pieces of RS information included in the QCLinformation may indicate the same RS, but each RS may correspond,respectively, to a different QCL parameter type.

For one TCI state indicating one piece of QCL information, one or twoRSs may be configured, and each RS corresponds to a different QCLparameter type, for example, two RSs form a group of QCL information, RScorresponds to QCL-TypeA, and RS2 corresponds to QCL-TypeD.

QCL types can include:

QCL-type TypeA: {a Doppler shift, Doppler spread, an average delay, adelay spread};

QCL-type TypeB: {a Doppler shift, Doppler spread};

QCL-TypeC: {an average delay, a Doppler shift};

QCL-TypeD: {a spatial Rx parameter}.

The network configures M search spaces for the UE to monitor the PDCCH,where CORESET X is associated with one or more of the search spaces.

For the beam failure detection, when the UE needs to determine the linkquality of the PDCCH corresponding to CORESET X, it is required todetermine to use a certain RS from the two RSs indicated by the TCIstate, where the instructing the UE to use one RS in the target TCIincludes one of the following:

in at least two RSs included in the target TCI, using an RScorresponding to a spatial QCL parameter that is, in the two RSs, usingthe RS corresponding to the spatial QCL information;

in the at least two RSs included in the target TCI, using an RS thatdoes not correspond to the spatial QCL parameter; that is, in the twoRSs, using the RS that does not correspond to the spatial QCLinformation;

in the at least two RSs included in the target TCI, causing the UE toselect an RS;

in the at least two RSs included in the target TCI, determining an RS tobe used according to serial numbers of the RSs; for example, in the twoRSs, determining which one to use according to the serial numbers of theRSs, and exemplarily, the RS with a small or a large serial number canbe selected, which can be set according to actual situations:

in the at least two RSs included in the target TCI, determining an RS tobe used according to locations of the RSs in configuration signaling;for example, in the two RSs, determining which one to use according tothe locations of the RSs in the configuration signaling, andexemplarily, the RS whose location is in the front or in the back can bedetermined.

Based on the foregoing solution, after the UE obtains the RS to be used,the RS is configured for measurement on the RS to determine whether alink quality corresponding to a PDCCH corresponding to the RS satisfiesa predetermined threshold.

Specifically, the RS may be used in a beam failure recovery procedure ora link reconfiguration procedure. For example, through measuring theCSI-RS and/or the SS/PBCH block, the UE determines whether the linkquality corresponding to the corresponding PDCCH satisfies apredetermined/configured threshold (a hypothetical BLER performanceratio threshold difference); the UE selects a new beam (whose L1-RSPRperformance is better than the threshold) that satisfies thepredetermined/configured threshold through the CSI-RS and/or the SS/PBCHblock; the UE selects a physical random access channel (PRACH)corresponding to the new beam to initiate transmission, or reports thenew selected beam through a physical uplink control channel (PUCCH); theUE detects a response of the network.

It should be further explained that the beam mentioned in the above isactually represented by information of a signal carried by the beam. Inactual use, it is represented by an index of the CSI-RS resource or thesynchronization signal (SS) block/PBCH block.

It can be seen that, by adopting the foregoing solution, when it iscapable of configuring the control resource set for the UE, only Kpieces of TCI are configured in part of the control resource sets, andat least one RS in the K pieces of TCI are indicated to the UE, thusavoiding that the UE measures RSs corresponding to all the TCI in allthe control resource sets, thereby reducing a power consumption of theUE and improving an accuracy of beam detection performed by the UE.

Embodiment 2

An embodiment of the present disclosure provides a method fordetermining an RS, which is applied to a UE. As shown in FIG. 2, themethod includes:

Step 201: receiving N control resource sets configured by a network sidefor a UE, where K pieces of transmission configuration indication (TCI)information is configured in at least part of control resource sets inthe N control resource sets, and a quantity of the TC configured indifferent control resource sets in the at least part of control resourcesets is the same or different; where N and K are integers greater thanor equal to 1, and at least one RS is indicated in the TCI information.

Step 202: receiving the at least one RS in the K pieces of TCIinformation indicated by the network side to the UE.

Here, the quantity of the TCI configured in different control resourcesets in the at least part of control resource sets is the same ordifferent, that is, K corresponding to the K pieces of TCI configured indifferent control resource sets (CORESET) in the at least part of theCORESETs can be the same or different.

In an NR system, a network can be configured with one or more CORESETs,each CORESET can contain a time-frequency resource (such as whichfrequency domain resources are occupied, how many consecutive timedomain symbols are occupied), and other configurations, such as a quasico-location (QCL) for an antenna port, the QCL is provided by ahigh-level parameter TCI, the parameter is configured for a DM-RSantenna port received by a PDCCH.

In addition, the method may further include: receiving M search spacesconfigured by the network side for the UE, and the at least part ofcontrol resource sets is associated with at least one search space ofthe M search spaces; and

detecting at least one RS in the K pieces of TCI information in acontrol resource set corresponding to a PDCCH according to theconfigured M search spaces.

That is, after aiming at the at least part of control resource sets(CORESET), it is necessary to indicate a search space associated withthe at least part of CORESETs to the UE, after which the UE will detectthe corresponding PDCCH.

Based on the above description, various processing scenarios areseparately performed below:

Scene 1

When one CORESET is configured with multiple TCI states, an RScorresponding to the activated TCI state is used as a measurement RS forbeam failure detection.

The network configures N CORESETs for the UE, where K TCI states areconfigured on CORESET X. The network configures M search spaces for theUE to monitor the PDCCH, where CORESET X is associated with one or moreof the search spaces.

In this scenario, when indicating the RS to be used, the followingmethod is adopted, where the indicating to the UE the at least one RS inthe K pieces of TCI information includes one of the following:

receiving an RS indicated by one piece of TCI information of the Kpieces of TC information activated through MAC CE signaling by thenetwork side;

receiving an RS indicated by one piece of TCI information of the Kpieces of TC information activated through DCI by the network side.

Specifically, for the beam failure detection, when the UE needs todetermine a link quality of the PDCCH corresponding to CORESET X, it isrequired to determine from the K TCI states that an RS indicated in acertain TCI state is used, and the determining method has the followingoptions:

in the K TCI states, the one activated under the indication of the MACCE signaling.

in the K TCI states, the one activated under the indication of the DC.

Scene 2

When one TCI state indicates one piece of QCL information, an RSassociated with a spatially correlated QCL is used as the measurement RSfor the beam failure detection.

The method further includes: receiving QCL information indicated by thenetwork side in the TCI; where the QCL information corresponds to atleast two pieces of RS information;

where RSs indicated by the at least two pieces of RS information are thesame or different, and different RS information corresponds to differentQCL parameter types.

That is, the network configures N CORESETs for the UE, where one TCIstate is configured on CORESET X, and the TCL state indicates one pieceof QCL information, and this QCL information corresponds to two RSs, andeach of the RSs corresponds to a different QCL parameter type. It shouldbe understood that two pieces of RS information included in the QCLinformation may indicate the same RS, but each RS may correspond,respectively, to a different QCL parameter type.

For one TCI state indicating one piece of QCL information, one or twoRSs may be configured, and each RS corresponds to a different QCLparameter type, for example, two RSs form a group of QCL information, RScorresponds to QCL-TypeA, and RS2 corresponds to QCL-TypeD.

QCL types can include:

QCL-type TypeA: {a Doppler shift, Doppler spread, an average delay, adelay spread};

QCL-type TypeB: {a Doppler shift, Doppler spread};

QCL-TypeC: {an average delay, a Doppler shift};

QCL-TypeD: {a spatial Rx parameter}.

The network configures M search spaces for the UE to monitor the PDCCH,where CORESET X is associated with one or more of the search spaces.

For the beam failure detection, when the UE needs to determine the linkquality of the PDCCH corresponding to CORESET X, it is required todetermine to use a certain RS from the two RSs indicated by the TCIstate, where the instructing the UE to use one RS in the target TCIincludes one of the following:

in at least two RSs included in the target TCI, using an RScorresponding to a spatial QCL parameter, that is, in the two RSs, usingthe RS corresponding to the spatial QCL information;

in the at least two RSs included in the target TCI, using an RS thatdoes not correspond to the spatial QCL parameter; that is, in the twoRSs, using the RS that does not correspond to the spatial QCLinformation:

in the at least two RSs included in the target TCI causing the UE toselect an RS;

in the at least two RSs included in the target TCI, determining an RS tobe used according to serial numbers of the RSs; for example, in the twoRSs, determining which one to use according to the serial numbers of theRSs, and exemplarily, the RS with a small or a large serial number canbe selected, which can be set according to actual situations;

in the at least two RSs included in the target TCI, determining an RS tobe used according to locations of the RSs in configuration signaling;for example, in the two RSs, determining which one to use according tothe locations of the RSs in the configuration signaling, andexemplarily, the RS whose location is in the front or in the back can bedetermined.

Based on the foregoing solution, after the UE obtains the RS to be used,the RS is configured for measurement on the RS to determine whether alink quality corresponding to a PDCCH corresponding to the RS satisfiesa predetermined threshold.

Specifically, the RS may be used in a beam failure recovery procedure ora link reconfiguration procedure. For example, through measuring theCSI-RS and/or the SS/PBCH block, the UE determines whether the linkquality corresponding to the corresponding PDCCH satisfies apredetermined/configured threshold (a hypothetical BLER performanceratio threshold difference); the UE selects a new beam (whose L1-RSPRperformance is better than the threshold) that satisfies thepredetermined/configured threshold through the CSI-RS and/or the SS/PBCHblock; the UE selects a PRACH corresponding to the new beam to initiatetransmission, or reports the new selected beam through a PUCCH; the UEdetects a response of the network.

It should be further explained that the beam mentioned in the above isactually represented by information of a signal carried by the beam. Inactual use, it is represented by an index of the CSI-RS resource or thesynchronization signal (SS) block/PBCH block.

It can be seen that, by adopting the foregoing solution, when it iscapable of configuring the control resource set for the UE, only Kpieces of TCI are configured in part of the control resource sets, andat least one RS in the K pieces of TCI are indicated to the UE, thusavoiding that the UE measures RSs corresponding to all the TI in all thecontrol resource sets, thereby reducing a power consumption of the UEand improving an accuracy of beam detection performed by the UE.

Embodiment 3

An embodiment of the disclosure provides a network device, including:

a first communicating unit, configured to configure N control resourcesets for a UE, where K pieces of transmission configuration indication(TCI) information is configured in at least part of control resourcesets in the N control resource sets, and a quantity of the TC configuredin different control resource sets in the at least part of controlresource sets is the same or different; where N and K are integersgreater than or equal to 1, and at least one RS is indicated in the TCIinformation; and indicate to the UE the at least one RS in the K piecesof TCI information.

Here, the quantity of the TCI configured in different control resourcesets in the at least part of control resource sets is the same ordifferent, that is, K corresponding to the K pieces of TCI configured indifferent Control Resource Sets (CORESET) in the at least part of theCORESETs can be the same or different.

In an NR system, a network can be configured with one or more CORESETs,each CORESET can contain a time-frequency resource (such as whichfrequency domain resources are occupied, how many consecutive timedomain symbols are occupied), and other configurations, such as a quasico-location (QCL) for an antenna port, the QCL is provided by ahigh-level parameter TCI, the parameter is configured for a DM-RSantenna port received by a PDCCH.

In addition, the first communicating unit configures M search spaces forthe UE, and the at least part of control resource sets is associatedwith at least one search space of the M search spaces, and the searchspaces are used for the UE to detect at least one RS in the K pieces ofTCI information in a control resource set corresponding to PDCCH.

That is, after aiming at the at least part of control resource sets(CORESET), it is necessary to indicate a search space associated withthe at least part of CORESETs to the UE, after which the UE will detectthe corresponding PDCCH.

Based on the above description, various processing scenarios areseparately performed below:

Scene 1

When one CORESET is configured with multiple TCI states, an RScorresponding to the activated TCI state is used as a measurement RS forbeam failure detection.

The network configures N CORESETs for the UE, where K TCI states areconfigured on CORESET X. The network configures M search spaces for theUE to monitor the PDCCH, where CORESET X is associated with one or moreof the search spaces.

In this scenario, when indicating the RS to be used, the firstcommunicating unit includes one of the following:

in the K pieces of TCI information, an RS indicated by TCI informationactivated through MAC CE signaling;

in the K pieces of TCI information, an RS indicated by TCI informationindicated through DCI.

Specifically, for the beam failure detection, when the UE needs todetermine a link quality of the PDCCH corresponding to CORESET X, it isrequired to determine from the K TCI states that an RS indicated in acertain TCI state is used, and the determining method has the followingoptions:

in the K TCI states, the one activated under the indication of the MACCE signaling.

in the K TCI states, the one activated under the indication of the DCI.

Scene 2

When one TCI state indicates one piece of QCL information, an RSassociated with a spatially correlated QCL is used as the measurement RSfor the beam failure detection.

The first communicating unit indicates QCL information in a piece ofTCI; where the QCL information corresponds to at least two pieces of RSinformation; where RSs indicated by the at least two pieces of RSinformation are the same or different, and different RS informationcorresponds to different QCL parameter types.

That is, the network configures N CORESETs for the UE, where one TCIstate is configured on CORESET X, and the TCL state indicates one pieceof QCL information, and this QCL information corresponds to two RSs, andeach of the RSs corresponds to a different QCL parameter type. It shouldbe understood that two pieces of RS information included in the QCLinformation may indicate the same RS, but each RS may correspond,respectively, to a different QCL parameter type.

For one TCI state indicating one piece of QCL information, one or twoRSs may be configured, and each RS corresponds to a different QCLparameter type, for example, two RSs form a group of QCL information,RS1 corresponds to QCL-TypeA, and RS2 corresponds to QCL-TypeD.

QCL types can include:

QCL-type TypeA: {a Doppler shift, Doppler spread, an average delay, adelay spread};

QCL-type TypeB: {a Doppler shift, Doppler spread};

QCL-TypeC: {an average delay, a Doppler shift};

QCL-TypeD: {a spatial Rx parameter}.

The network configures M search spaces for the UE to monitor the PDCCH,where CORESET X is associated with one or more of the search spaces.

For the beam failure detection, when the UE needs to determine the linkquality of the PDCCH corresponding to CORESET X, it is required todetermine to use a certain RS from the two RSs indicated by the TCIstate, where the UE is instructed to use one RS in the target TCI, thefirst communicating unit includes one of the following:

in at least two RSs included in the target TCI, using an RScorresponding to a spatial QCL parameter: that is, in the two RSs, usingthe RS corresponding to the spatial QCL information:

in the at least two RSs included in the target TCI, using an RS thatdoes not correspond to the spatial QCL parameter; that is, in the twoRSs, using the RS that does not correspond to the spatial QCLinformation;

in the at least two RSs included in the target TCI, causing the UE toselect an RS;

in the at least two RSs included in the target TCI, determining an RS tobe used according to serial numbers of the RSs; for example, in the twoRSs, determining which one to use according to the serial numbers of theRSs, and exemplarily, the RS with a small or a large serial number canbe selected, which can be set according to actual situations;

in the at least two RSs included in the target TCI, determining an RS tobe used according to locations of the RSs in configuration signaling;for example, in the two RSs, determining which one to use according tothe locations of the RSs in the configuration signaling, andexemplarily, the RS whose location is in the front or in the back can bedetermined.

Based on the foregoing solution, after the UE obtains the RS to be used,the RS is configured for measurement on the RS to determine whether alink quality corresponding to a PDCCH corresponding to the RS satisfiesa predetermined threshold.

Specifically, the RS may be used in a beam failure recovery procedure ora link reconfiguration procedure. For example, through measuring theCSI-RS and/or the SS/PBCH block, the UE determines whether the linkquality corresponding to the corresponding PDCCH satisfies apredetermined/configured threshold (a hypothetical BLER performanceratio threshold difference); the UE selects a new beam (whose L1-RSPRperformance is better than the threshold) that satisfies thepredetermined/configured threshold through the CSI-RS and/or the SS/PBCHblock; the UE selects a PRACH corresponding to the new beam to initiatetransmission, or reports the new selected beam through a PUCCH; the UEdetects a response of the network.

It should be further explained that the beam mentioned in the above isactually represented by information of a signal carried by the beam. Inactual use, it is represented by an index of the CSI-RS resource or thesynchronization signal (SS) block/PBCH block.

It can be seen that, by adopting the foregoing solution, when it iscapable of configuring the control resource set for the UE, only Kpieces of TCI are configured in part of the control resource sets, andat least one RS in the K pieces of TCI are indicated to the UE, thusavoiding that the UE measures RSs corresponding to all the TCI in allthe control resource sets, thereby reducing a power consumption of theUE and improving an accuracy of beam detection performed by the UE.

Embodiment 4

An embodiment of the present disclosure provides a UE, as shown in FIG.3, including:

a second communicating unit 31 for receiving N control resource setsconfigured by a network side for a UE, where K pieces of transmissionconfiguration indication (TCI) information is configured in at leastpart of control resource sets in the N control resource sets, and aquantity of the TCI configured in different control resource sets in theat least part of control resource sets is the same or different; where Nand K are integers greater than or equal to 1, and at least one RS isindicated in the TCI information; and receiving the at least one RS inthe K pieces of TCI information indicated by the network side to the UE.

Here, the quantity of the TCI configured in different control resourcesets in the at least part of control resource sets is the same ordifferent, that is. K corresponding to the K pieces of TCI configured indifferent Control Resource Sets (CORESET) in the at least part of theCORESETs can be the same or different.

In an NR system, a network can be configured with one or more CORESETs,each CORESET can contain a time-frequency resource (such as whichfrequency domain resources are occupied, how many consecutive timedomain symbols are occupied), and other configurations, such as a quasico-location (QCL) for an antenna port, the QCL is provided by ahigh-level parameter TCI, the parameter is configured for a DM-RSantenna port received by a PDCCH.

In addition, the UE further includes:

a second communicating unit 31 is configured to receive M search spacesconfigured by the network side for the UE, and the at least part ofcontrol resource sets is associated with at least one search space ofthe M search spaces; and

the second processing unit 32 is configured to detect at least one RS inthe K pieces of TCI information in a control resource set correspondingto a PDCCH according to the configured M search spaces.

That is, after aiming at the at least part of control resource sets(CORESET), it is necessary to indicate a search space associated withthe at least part of CORESETs to the UE, after which the UE will detectthe corresponding PDCCH.

Based on the above description, various processing scenarios areseparately performed below:

Scene 1

When one CORESET is configured with multiple TCI states, an RScorresponding to the activated TCI state is used as a measurement RS forbeam failure detection.

The network configures N CORESETs for the UE, where K TCI states areconfigured on CORESET X. The network configures M search spaces for theUE to monitor the PDCCH, where CORESET X is associated with one or moreof the search spaces.

In this scenario, when indicating the RS to be used, the secondcommunicating unit 31 includes one of the following:

receiving an RS indicated by one piece of TCI information of the Kpieces of TCI information activated through MAC CE signaling by thenetwork side;

receiving an RS indicated by one piece of TCI information of the Kpieces of TCI information activated through DCI by the network side.

Specifically, for the beam failure detection, when the UE needs todetermine a link quality of the PDCCH corresponding to CORESET X, it isrequired to determine from the K TCI states that an RS indicated in acertain T state is used, and the determining method has the followingoptions:

in the K TCI states, the one activated under the indication of the MACCE signaling.

in the K TCI states, the one activated under the indication of the DCI.

Scene 2

When one TCI state indicates one piece of QCL information, an RSassociated with a spatially correlated QCL is used as the measurement RSfor the beam failure detection.

The second communicating unit 31 receives QCL information indicated bythe network side in the TCI; where the QCL information corresponds to atleast two pieces of RS information;

where RSs indicated by the at least two pieces of RS information are thesame or different, and different RS information corresponds to differentQCL parameter types.

That is, the network configures N CORESETs for the UE, where one TCIstate is configured on CORESET X, and the TCL state indicates one pieceof QCL information, and this QCL information corresponds to two RSs, andeach of the RSs corresponds to a different QCL parameter type. It shouldbe understood that two pieces of RS information included in the QCLinformation may indicate the same RS, but each RS may correspond,respectively, to a different QCL parameter type.

For one TCI state indicating one piece of QCL information, one or twoRSs may be configured, and each RS corresponds to a different QCLparameter type, for example, two RSs form a group of QCL information,RS1 corresponds to QCL-TypeA, and RS2 corresponds to QCL-TypeD.

QCL types can include:

QCL-type TypeA: {a Doppler shift, Doppler spread, an average delay, adelay spread};

QCL-type TypeB: {a Doppler shift, Doppler spread}:

QCL-TypeC: {an average delay, a Doppler shift};

QCL-TypeD: {a spatial Rx parameter}.

The network configures M search spaces for the UE to monitor the PDCCH,where CORESET X is associated with one or more of the search spaces.

For the beam failure detection, when the UE needs to determine the linkquality of the PDCCH corresponding to CORESET X, it is required todetermine to use a certain RS from the two RSs indicated by the TCIstate, where the UE is instructed to use one RS in the target TCI, thesecond processing unit 32 includes one of the following:

in at least two RSs included in the target TC, using an RS correspondingto a spatial QCL parameter; that is, in the two RSs, using the RScorresponding to the spatial QCL information:

in the at least two RSs included in the target TCI, using an RS thatdoes not correspond to the spatial QCL parameter; that is, in the twoRSs, using the RS that does not correspond to the spatial QCLinformation;

in the at least two RSs included in the target TCI, causing the UE toselect an RS;

in the at least two RSs included in the target TCI, determining an RS tobe used according to serial numbers of the RSs; for example, in the twoRSs, determining which one to use according to the serial numbers of theRSs, and exemplarily, the RS with a small or a large serial number canbe selected, which can be set according to actual situations;

in the at least two RSs included in the target TCI, determining an RS tobe used according to locations of the RSs in configuration signaling;for example, in the two RSs, determining which one to use according tothe locations of the RSs in the configuration signaling, andexemplarily, the RS whose location is in the front or in the back can bedetermined.

Based on the foregoing solution, after the UE obtains the RS to be used,the RS is configured for measurement on the RS to determine whether alink quality corresponding to a PDCCH corresponding to the RS satisfiesa predetermined threshold.

Specifically, the RS may be used in a beam failure recovery procedure ora link reconfiguration procedure. For example, through measuring theCSI-RS and/or the SS/PBCH block, the UE determines whether the linkquality corresponding to the corresponding PDCCH satisfies apredetermined/configured threshold (a hypothetical BLER performanceratio threshold difference); the UE selects a new beam (whose L-RSPRperformance is better than the threshold) that satisfies thepredetermined/configured threshold through the CSI-RS and/or the SS/PBCHblock; the UE selects a PRACH corresponding to the new beam to initiatetransmission, or reports the new selected beam through a PUCCH; the UEdetects a response of the network.

It should be further explained that the beam mentioned in the above isactually represented by information of a signal carried by the beam. Inactual use, it is represented by an index of the CSI-RS resource or thesynchronization signal (SS) block/PBCH block index.

It can be seen that, by adopting the foregoing solution, when it iscapable of configuring the control resource set for the UE, only Kpieces of TCI are configured in part of the control resource sets, andat least one RS in the K pieces of TCI are indicated to the UE, thusavoiding that the UE measures RSs corresponding to all the TCI in allthe control resource sets, thereby reducing a power consumption of theUE and improving an accuracy of beam detection performed by the UE.

An embodiment of the present disclosure further provides a hardwarearchitectural structure of a user equipment (UE) or a network device,which, as shown in FIG. 4, includes at least one processor 41, a memory42, and at least one network interface 43. The various components arecoupled together through a bus system 44. It will be understood that thebus system 44 is configured to implement connection and communicationbetween these components. The bus system 44 includes, in addition to adata bus, a power bus, a control bus, and a status signal bus. However,for clarity of description, various buses are labeled as the bus system44 in FIG. 4.

It is understood that the memory 42 in the embodiment of the presentdisclosure may be a volatile memory or a non-volatile memory, or mayinclude both volatile and non-volatile memories.

In some embodiments, the memory 42 stores the following elements,executable modules or data structures, or a subset thereof, or theirextension set:

an operating system 421 and an application 422.

The processor 41 is configured to be capable of processing the methodsteps in Embodiment 1 or Embodiment 2, and details are not describedherein.

The above apparatus according to the embodiments of the presentdisclosure may be stored in a computer readable storage medium if beingimplemented in the form of a software functional module and sold or usedas a standalone product. Based on such understanding, the essence of thetechnical solutions of the embodiments of the present disclosure, or apart of the technical solutions of the present disclosure contributingto the prior art, may be embodied in the form of a software productwhich is stored in a storage medium, including instructions for enablinga computer device (which may be a personal computer, a server, or anetwork device, etc.) to perform all or part of the methods described inthe embodiments of the present disclosure. The above storage mediumincludes: various mediums capable of storing program codes, such as auniversal serial bus (USB) flash disk, a mobile hard disk, a read-onlymemory (ROM), a magnetic disk, an optical disk, or the like. Thus, theembodiments of the present disclosure are not limited to any specificcombination of hardware and software.

An embodiment of the present disclosure provides a computer storagemedium storing computer executable instructions which, when beingexecuted, perform the steps of the method of Embodiment 1 or Embodiment2.

While preferred embodiments of the present disclosure have beendisclosed for purposes of illustration, those skilled in the art willrecognize that various modifications, additions and substitutions arepossible, and thus the scope of the present disclosure should not belimited to the embodiments described above.

What is claimed is:
 1. A method for determining a reference signal (RS),applied to a network device and comprising: configuring N controlresource sets for a user equipment (UE), wherein K pieces oftransmission configuration indication (TCI) information is configured ineach of at least part of control resource sets in the N control resourcesets, and a quantity of the TCI information K configured in differentcontrol resource sets in the at least part of control resource sets isthe same or different; wherein N and K are integers greater than orequal to 1, and at least one RS is indicated in each piece of TCIinformation; and indicating to the UE the at least one RS in the Kpieces of TCI information; wherein the RS is used to determine whether alink quality corresponding to a physical downlink control channel(PDCCH) corresponding to the RS satisfies a predetermined threshold. 2.The method according to claim 1, wherein the method further comprises:indicating quasi co-location (QCL) information in each piece of TCIinformation; wherein the QCL information corresponds to at least twopieces of RS information; wherein RSs indicated by the at least twopieces of RS information are the same or different, and different RSinformation corresponds to different QCL parameter types.
 3. The methodaccording to claim 1, wherein the indicating to the UE the at least oneRS in the K pieces of TCI information comprises: indicating one piece oftarget TCI information in the K pieces of TCI information to the UE andinstructing the UE to use an RS indicated by the target TCI information.4. The method according to claim 3, wherein the instructing the UE touse an RS indicated by the target TCI information comprises one of thefollowing: in at least two RSs comprised in the target TCI information,using an RS corresponding to QCL-TypeD; in the at least two RSscomprised in the target TCI information, using an RS that does notcorrespond to the QCL-TypeD; in the at least two RSs comprised in thetarget TCI information, causing the UE to select an RS; in the at leasttwo RSs comprised in the target TCI information, determining an RS to beused according to serial numbers of the RSs; in the at least two RSscomprised in the target TCI information, determining an RS to be usedaccording to locations of the RSs in configuration signaling.
 5. Themethod according to claim 1, wherein the predetermined threshold is avalue of block error ratio (BLER).
 6. A method for determining areference signal (RS), applied to a user equipment (UE) and comprising:receiving N control resource sets configured by a network side for theUE, wherein K pieces of transmission configuration indication (TCI)information is configured in each of at least part of control resourcesets in the N control resource sets, and a quantity of the TCIinformation K configured in different control resource sets in the atleast part of control resource sets is the same or different; wherein Nand K are integers greater than or equal to 1, and at least one RS isindicated in each piece of TCI information; and receiving the at leastone RS in the K pieces of TCI information indicated by the network sideto the UE; wherein the RS is used to determine whether a link qualitycorresponding to a physical downlink control channel (PDCCH)corresponding to the RS satisfies a predetermined threshold.
 7. Themethod according to claim 6, wherein the method further comprises:receiving quasi co-location (QCL) information indicated by the networkside in each piece of TCI information; wherein the QCL informationcorresponds to at least two pieces of RS information; wherein RSsindicated by the at least two pieces of RS information are the same ordifferent, and different RS information corresponds to different QCLparameter types.
 8. The method according to claim 6, wherein thereceiving the at least one RS in the K pieces of TCI informationindicated by the network side to the UE comprises: receiving one pieceof target TCI information in the K pieces of TCI information indicatedby the network side to the UE, and receiving an RS indicated by thetarget TCI information and instructed by the network side for use at theUE.
 9. The method according to claim 8, wherein the receiving an RSindicated by the target TCI information and instructed by the networkside for use at the UE comprises one of the following: in at least twoRSs comprised in the target TCI information, using an RS correspondingto QCL-TypeD; in the at least two RSs comprised in the target TCIinformation, using an RS that does not correspond to the QCL-TypeD; inthe at least two RSs comprised in the target TCI information, causingthe UE to select an RS; in the at least two RSs comprised in the targetTCI information, determining an RS to be used according to serialnumbers of the RSs; in the at least two RSs comprised in the target TCIinformation, determining an RS to be used according to locations of theRSs in configuration signaling.
 10. The method according to claim 6,wherein the predetermined threshold is a value of block error ratio(BLER).
 11. A network device, comprising a processor and a memory forstoring a computer program capable of running on the processor, whereinwhen the computer program is run, the processor is configured to:configure N control resource sets for a user equipment (UE), wherein Kpieces of transmission configuration indication (TCI) information isconfigured in each of at least part of control resource sets in the Ncontrol resource sets, and a quantity of the TCI information Kconfigured in different control resource sets in the at least part ofcontrol resource sets is the same or different; wherein N and K areintegers greater than or equal to 1, and at least one RS is indicated ineach piece of TCI information; and control a network interface toindicate to the UE the at least one RS in the K pieces of TCIinformation; wherein the RS is used to determine whether a link qualitycorresponding to a physical downlink control channel (PDCCH)corresponding to the RS satisfies a predetermined threshold.
 12. Thenetwork device according to claim 11, wherein the processor isconfigured to indicate quasi co-location (QCL) information in each pieceof TCI information; wherein the QCL information corresponds to at leasttwo pieces of RS information; wherein RSs indicated by the at least twopieces of RS information are the same or different, and different RSinformation corresponds to different QCL parameter types.
 13. Thenetwork device according to claim 11, wherein the processor isconfigured to indicate one piece of target TCI information in the Kpieces of TCI information to the UE and instruct the UE to use an RSindicated by the target TCI information.
 14. The network deviceaccording to claim 13, wherein the processor is configured to performone of the following: in at least two RSs comprised in the target TCIinformation, using an RS corresponding to QCL-TypeD; in the at least twoRSs comprised in the target TCI information, using an RS that does notcorrespond to the QCL-TypeD; in the at least two RSs comprised in thetarget TCI information, causing the UE to select an RS; in the at leasttwo RSs comprised in the target TCI information, determining an RS to beused according to serial numbers of the RSs; in the at least two RSscomprised in the target TCI information, determining an RS to be usedaccording to locations of the RSs in configuration signaling.
 15. Thenetwork device according to claim 11, wherein the predeterminedthreshold is a value of block error ratio (BLER).
 16. A user equipment(UE), comprising a processor and a memory for storing a computer programcapable of running on the processor, wherein when the computer programis run, the processor is configured to: control a network interface toreceive N control resource sets configured by a network side for the UE,wherein K pieces of transmission configuration indication (TCI)information is configured in each of at least part of control resourcesets in the N control resource sets, and a quantity of the TCIinformation K configured in different control resource sets in the atleast part of control resource sets is the same or different; wherein Nand K are integers greater than or equal to 1, and at least one RS isindicated in each piece of TCI information; and control the networkinterface to receive the at least one RS in the K pieces of TCIinformation indicated by the network side to the UE; wherein the RS isused to determine whether a link quality corresponding to a physicaldownlink control channel (PDCCH) corresponding to the RS satisfies apredetermined threshold.
 17. The UE according to claim 16, wherein theprocessor is configured to control the network interface to receivequasi co-location (QCL) information indicated by the network side ineach piece of TCI information; wherein the QCL information correspondsto at least two pieces of RS information; wherein RSs indicated by theat least two pieces of RS information are the same or different, anddifferent RS information corresponds to different QCL parameter types.18. The UE according to claim 16, wherein the processor is configured tocontrol the network interface to receive one piece of target TCIinformation in the K pieces of TCI information indicated by the networkside, and receive an RS indicated by the target TCI information andinstructed by the network side for use at the UE.
 19. The UE accordingto claim 18, wherein the processor is further configured to perform oneof the following: in at least two RSs comprised in the target TCIinformation, using an RS corresponding to QCL-TypeD; in the at least twoRSs comprised in the target TCI information, using an RS that does notcorrespond to the QCL-TypeD; in the at least two RSs comprised in thetarget TCI information, causing the UE to select an RS; in the at leasttwo RSs comprised in the target TCI information, determining an RS to beused according to serial numbers of the RSs; in the at least two RSscomprised in the target TCI information, determining an RS to be usedaccording to locations of the RSs in configuration signaling.
 20. The UEaccording to claim 16, wherein the predetermined threshold is a value ofblock error ratio (BLER).